74F169SJX

Overview

The Fairchild Semiconductor 74F169SJX is a 4-bit synchronous bidirectional binary counter belonging to the F/FAST logic series. It operates on positive edge triggering and supports both up and down counting directions via separate clock inputs. The device features parallel load capabilities and includes TCO (Terminal Count Output) signals for cascading applications. It is housed in a 16-lead Small Outline Package (SOP) with a standard .3-inch width. The component is designed for high-speed digital timing and sequencing tasks within compatible voltage ranges.

Feature Summary

• Supports synchronous bidirectional counting with independent up and down clock inputs
• Includes parallel load functionality for direct data entry into the counter register
• Provides terminal count outputs to facilitate multi-stage cascading configurations

Applications

• Digital frequency division circuits
• Sequential event timing controllers
• Cascaded counter systems requiring precise synchronization

Procurement Notes

Verify the specific package variant, as suffixes may indicate different physical dimensions or lead finishes. Confirm RoHS compliance status through official documentation. Check for discontinued status or lifecycle notices from Fairchild Semiconductor prior to procurement. Ensure voltage specifications match the target system requirements.

Selection Notes

Select this component when a synchronous 4-bit bidirectional counter is required in a surface-mount SOP package. Compare against similar F/FAST series parts like the 74F193SJ if pin compatibility differs. Ensure the design accommodates the specific propagation delays and loading characteristics defined in the datasheet.

Part Context

This part belongs to the Fairchild 74F series of high-speed logic devices. It is functionally related to other 4-bit counters such as the 74F161APC_NL, though directionality and package types vary. The SJX suffix typically denotes a specific tape-and-reel or SOP configuration within the broader 74F169 family.

Replacement Considerations

The 74F169PC is a documented alternative offering identical logical functions but in a PDIP package. Verify pinout compatibility and thermal management requirements when substituting between SOP and DIP formats.